man_term.c

   1 /*      $Id: man_term.c,v 1.94 2011/01/04 01:23:18 schwarze Exp $ */
   2 /*
   3  * Copyright (c) 2008, 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
   4  * Copyright (c) 2010, 2011 Ingo Schwarze <schwarze@openbsd.org>
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18 #ifdef HAVE_CONFIG_H
  19 #include "config.h"
  20 #endif
  21
  22 #include <sys/types.h>
  23
  24 #include <assert.h>
  25 #include <ctype.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29
  30 #include "mandoc.h"
  31 #include "out.h"
  32 #include "man.h"
  33 #include "term.h"
  34 #include "chars.h"
  35 #include "main.h"
  36
  37 #define INDENT            7
  38 #define HALFINDENT        3
  39
  40 /* FIXME: have PD set the default vspace width. */
  41
  42 struct  mtermp {
  43         int               fl;
  44 #define MANT_LITERAL     (1 << 0)
  45         /*
  46          * Default amount to indent the left margin after leading text
  47          * has been printed (e.g., `HP' left-indent, `TP' and `IP' body
  48          * indent).  This needs to be saved because `HP' and so on, if
  49          * not having a specified value, must default.
  50          *
  51          * Note that this is the indentation AFTER the left offset, so
  52          * the total offset is usually offset + lmargin.
  53          */
  54         size_t            lmargin;
  55         /*
  56          * The default offset, i.e., the amount between any text and the
  57          * page boundary.
  58          */
  59         size_t            offset;
  60 };
  61
  62 #define DECL_ARGS         struct termp *p, \
  63                           struct mtermp *mt, \
  64                           const struct man_node *n, \
  65                           const struct man_meta *m
  66
  67 struct  termact {
  68         int             (*pre)(DECL_ARGS);
  69         void            (*post)(DECL_ARGS);
  70         int               flags;
  71 #define MAN_NOTEXT       (1 << 0) /* Never has text children. */
  72 };
  73
  74 static  int               a2width(const struct termp *, const char *);
  75 static  size_t            a2height(const struct termp *, const char *);
  76
  77 static  void              print_man_nodelist(DECL_ARGS);
  78 static  void              print_man_node(DECL_ARGS);
  79 static  void              print_man_head(struct termp *, const void *);
  80 static  void              print_man_foot(struct termp *, const void *);
  81 static  void              print_bvspace(struct termp *,
  82                                 const struct man_node *);
  83
  84 static  int               pre_alternate(DECL_ARGS);
  85 static  int               pre_B(DECL_ARGS);
  86 static  int               pre_HP(DECL_ARGS);
  87 static  int               pre_I(DECL_ARGS);
  88 static  int               pre_IP(DECL_ARGS);
  89 static  int               pre_PP(DECL_ARGS);
  90 static  int               pre_RS(DECL_ARGS);
  91 static  int               pre_SH(DECL_ARGS);
  92 static  int               pre_SS(DECL_ARGS);
  93 static  int               pre_TP(DECL_ARGS);
  94 static  int               pre_ign(DECL_ARGS);
  95 static  int               pre_in(DECL_ARGS);
  96 static  int               pre_literal(DECL_ARGS);
  97 static  int               pre_sp(DECL_ARGS);
  98 static  int               pre_ft(DECL_ARGS);
  99
 100 static  void              post_IP(DECL_ARGS);
 101 static  void              post_HP(DECL_ARGS);
 102 static  void              post_RS(DECL_ARGS);
 103 static  void              post_SH(DECL_ARGS);
 104 static  void              post_SS(DECL_ARGS);
 105 static  void              post_TP(DECL_ARGS);
 106
 107 static  const struct termact termacts[MAN_MAX] = {
 108         { pre_sp, NULL, MAN_NOTEXT }, /* br */
 109         { NULL, NULL, 0 }, /* TH */
 110         { pre_SH, post_SH, 0 }, /* SH */
 111         { pre_SS, post_SS, 0 }, /* SS */
 112         { pre_TP, post_TP, 0 }, /* TP */
 113         { pre_PP, NULL, 0 }, /* LP */
 114         { pre_PP, NULL, 0 }, /* PP */
 115         { pre_PP, NULL, 0 }, /* P */
 116         { pre_IP, post_IP, 0 }, /* IP */
 117         { pre_HP, post_HP, 0 }, /* HP */
 118         { NULL, NULL, 0 }, /* SM */
 119         { pre_B, NULL, 0 }, /* SB */
 120         { pre_alternate, NULL, 0 }, /* BI */
 121         { pre_alternate, NULL, 0 }, /* IB */
 122         { pre_alternate, NULL, 0 }, /* BR */
 123         { pre_alternate, NULL, 0 }, /* RB */
 124         { NULL, NULL, 0 }, /* R */
 125         { pre_B, NULL, 0 }, /* B */
 126         { pre_I, NULL, 0 }, /* I */
 127         { pre_alternate, NULL, 0 }, /* IR */
 128         { pre_alternate, NULL, 0 }, /* RI */
 129         { NULL, NULL, MAN_NOTEXT }, /* na */
 130         { pre_sp, NULL, MAN_NOTEXT }, /* sp */
 131         { pre_literal, NULL, 0 }, /* nf */
 132         { pre_literal, NULL, 0 }, /* fi */
 133         { NULL, NULL, 0 }, /* RE */
 134         { pre_RS, post_RS, 0 }, /* RS */
 135         { pre_ign, NULL, 0 }, /* DT */
 136         { pre_ign, NULL, 0 }, /* UC */
 137         { pre_ign, NULL, 0 }, /* PD */
 138         { pre_ign, NULL, 0 }, /* AT */
 139         { pre_in, NULL, MAN_NOTEXT }, /* in */
 140         { pre_ft, NULL, MAN_NOTEXT }, /* ft */
 141 };
 142
 143
 144
 145 void
 146 terminal_man(void *arg, const struct man *man)
 147 {
 148         struct termp            *p;
 149         const struct man_node   *n;
 150         const struct man_meta   *m;
 151         struct mtermp            mt;
 152
 153         p = (struct termp *)arg;
 154
 155         p->overstep = 0;
 156         p->maxrmargin = p->defrmargin;
 157         p->tabwidth = term_len(p, 5);
 158
 159         if (NULL == p->symtab)
 160                 switch (p->enc) {
 161                 case (TERMENC_ASCII):
 162                         p->symtab = chars_init(CHARS_ASCII);
 163                         break;
 164                 default:
 165                         abort();
 166                         /* NOTREACHED */
 167                 }
 168
 169         n = man_node(man);
 170         m = man_meta(man);
 171
 172         term_begin(p, print_man_head, print_man_foot, m);
 173         p->flags |= TERMP_NOSPACE;
 174
 175         mt.fl = 0;
 176         mt.lmargin = term_len(p, INDENT);
 177         mt.offset = term_len(p, INDENT);
 178
 179         if (n->child)
 180                 print_man_nodelist(p, &mt, n->child, m);
 181
 182         term_end(p);
 183 }
 184
 185
 186 static size_t
 187 a2height(const struct termp *p, const char *cp)
 188 {
 189         struct roffsu    su;
 190
 191         if ( ! a2roffsu(cp, &su, SCALE_VS))
 192                 SCALE_VS_INIT(&su, term_strlen(p, cp));
 193
 194         return(term_vspan(p, &su));
 195 }
 196
 197
 198 static int
 199 a2width(const struct termp *p, const char *cp)
 200 {
 201         struct roffsu    su;
 202
 203         if ( ! a2roffsu(cp, &su, SCALE_BU))
 204                 return(-1);
 205
 206         return((int)term_hspan(p, &su));
 207 }
 208
 209
 210 static void
 211 print_bvspace(struct termp *p, const struct man_node *n)
 212 {
 213         term_newln(p);
 214
 215         if (NULL == n->prev)
 216                 return;
 217
 218         if (MAN_SS == n->prev->tok)
 219                 return;
 220         if (MAN_SH == n->prev->tok)
 221                 return;
 222
 223         term_vspace(p);
 224 }
 225
 226
 227 /* ARGSUSED */
 228 static int
 229 pre_ign(DECL_ARGS)
 230 {
 231
 232         return(0);
 233 }
 234
 235
 236 /* ARGSUSED */
 237 static int
 238 pre_I(DECL_ARGS)
 239 {
 240
 241         term_fontrepl(p, TERMFONT_UNDER);
 242         return(1);
 243 }
 244
 245
 246 /* ARGSUSED */
 247 static int
 248 pre_literal(DECL_ARGS)
 249 {
 250
 251         term_newln(p);
 252
 253         if (MAN_nf == n->tok)
 254                 mt->fl |= MANT_LITERAL;
 255         else
 256                 mt->fl &= ~MANT_LITERAL;
 257
 258         return(1);
 259 }
 260
 261 /* ARGSUSED */
 262 static int
 263 pre_alternate(DECL_ARGS)
 264 {
 265         enum termfont            font[2];
 266         const struct man_node   *nn;
 267         int                      savelit, i;
 268
 269         switch (n->tok) {
 270         case (MAN_RB):
 271                 font[0] = TERMFONT_NONE;
 272                 font[1] = TERMFONT_BOLD;
 273                 break;
 274         case (MAN_RI):
 275                 font[0] = TERMFONT_NONE;
 276                 font[1] = TERMFONT_UNDER;
 277                 break;
 278         case (MAN_BR):
 279                 font[0] = TERMFONT_BOLD;
 280                 font[1] = TERMFONT_NONE;
 281                 break;
 282         case (MAN_BI):
 283                 font[0] = TERMFONT_BOLD;
 284                 font[1] = TERMFONT_UNDER;
 285                 break;
 286         case (MAN_IR):
 287                 font[0] = TERMFONT_UNDER;
 288                 font[1] = TERMFONT_NONE;
 289                 break;
 290         case (MAN_IB):
 291                 font[0] = TERMFONT_UNDER;
 292                 font[1] = TERMFONT_BOLD;
 293                 break;
 294         default:
 295                 abort();
 296         }
 297
 298         savelit = MANT_LITERAL & mt->fl;
 299         mt->fl &= ~MANT_LITERAL;
 300
 301         for (i = 0, nn = n->child; nn; nn = nn->next, i = 1 - i) {
 302                 term_fontrepl(p, font[i]);
 303                 if (savelit && NULL == nn->next)
 304                         mt->fl |= MANT_LITERAL;
 305                 print_man_node(p, mt, nn, m);
 306                 if (nn->next)
 307                         p->flags |= TERMP_NOSPACE;
 308         }
 309
 310         return(0);
 311 }
 312
 313 /* ARGSUSED */
 314 static int
 315 pre_B(DECL_ARGS)
 316 {
 317
 318         term_fontrepl(p, TERMFONT_BOLD);
 319         return(1);
 320 }
 321
 322 /* ARGSUSED */
 323 static int
 324 pre_ft(DECL_ARGS)
 325 {
 326         const char      *cp;
 327
 328         if (NULL == n->child) {
 329                 term_fontlast(p);
 330                 return(0);
 331         }
 332
 333         cp = n->child->string;
 334         switch (*cp) {
 335         case ('4'):
 336                 /* FALLTHROUGH */
 337         case ('3'):
 338                 /* FALLTHROUGH */
 339         case ('B'):
 340                 term_fontrepl(p, TERMFONT_BOLD);
 341                 break;
 342         case ('2'):
 343                 /* FALLTHROUGH */
 344         case ('I'):
 345                 term_fontrepl(p, TERMFONT_UNDER);
 346                 break;
 347         case ('P'):
 348                 term_fontlast(p);
 349                 break;
 350         case ('1'):
 351                 /* FALLTHROUGH */
 352         case ('C'):
 353                 /* FALLTHROUGH */
 354         case ('R'):
 355                 term_fontrepl(p, TERMFONT_NONE);
 356                 break;
 357         default:
 358                 break;
 359         }
 360         return(0);
 361 }
 362
 363 /* ARGSUSED */
 364 static int
 365 pre_in(DECL_ARGS)
 366 {
 367         int              len, less;
 368         size_t           v;
 369         const char      *cp;
 370
 371         term_newln(p);
 372
 373         if (NULL == n->child) {
 374                 p->offset = mt->offset;
 375                 return(0);
 376         }
 377
 378         cp = n->child->string;
 379         less = 0;
 380
 381         if ('-' == *cp)
 382                 less = -1;
 383         else if ('+' == *cp)
 384                 less = 1;
 385         else
 386                 cp--;
 387
 388         if ((len = a2width(p, ++cp)) < 0)
 389                 return(0);
 390
 391         v = (size_t)len;
 392
 393         if (less < 0)
 394                 p->offset -= p->offset > v ? v : p->offset;
 395         else if (less > 0)
 396                 p->offset += v;
 397         else
 398                 p->offset = v;
 399
 400         return(0);
 401 }
 402
 403
 404 /* ARGSUSED */
 405 static int
 406 pre_sp(DECL_ARGS)
 407 {
 408         size_t           i, len;
 409
 410         switch (n->tok) {
 411         case (MAN_br):
 412                 len = 0;
 413                 break;
 414         default:
 415                 len = n->child ? a2height(p, n->child->string) : 1;
 416                 break;
 417         }
 418
 419         if (0 == len)
 420                 term_newln(p);
 421         for (i = 0; i < len; i++)
 422                 term_vspace(p);
 423
 424         return(0);
 425 }
 426
 427
 428 /* ARGSUSED */
 429 static int
 430 pre_HP(DECL_ARGS)
 431 {
 432         size_t                   len;
 433         int                      ival;
 434         const struct man_node   *nn;
 435
 436         switch (n->type) {
 437         case (MAN_BLOCK):
 438                 print_bvspace(p, n);
 439                 return(1);
 440         case (MAN_BODY):
 441                 p->flags |= TERMP_NOBREAK;
 442                 p->flags |= TERMP_TWOSPACE;
 443                 break;
 444         default:
 445                 return(0);
 446         }
 447
 448         len = mt->lmargin;
 449         ival = -1;
 450
 451         /* Calculate offset. */
 452
 453         if (NULL != (nn = n->parent->head->child))
 454                 if ((ival = a2width(p, nn->string)) >= 0)
 455                         len = (size_t)ival;
 456
 457         if (0 == len)
 458                 len = term_len(p, 1);
 459
 460         p->offset = mt->offset;
 461         p->rmargin = mt->offset + len;
 462
 463         if (ival >= 0)
 464                 mt->lmargin = (size_t)ival;
 465
 466         return(1);
 467 }
 468
 469
 470 /* ARGSUSED */
 471 static void
 472 post_HP(DECL_ARGS)
 473 {
 474
 475         switch (n->type) {
 476         case (MAN_BLOCK):
 477                 term_flushln(p);
 478                 break;
 479         case (MAN_BODY):
 480                 term_flushln(p);
 481                 p->flags &= ~TERMP_NOBREAK;
 482                 p->flags &= ~TERMP_TWOSPACE;
 483                 p->offset = mt->offset;
 484                 p->rmargin = p->maxrmargin;
 485                 break;
 486         default:
 487                 break;
 488         }
 489 }
 490
 491
 492 /* ARGSUSED */
 493 static int
 494 pre_PP(DECL_ARGS)
 495 {
 496
 497         switch (n->type) {
 498         case (MAN_BLOCK):
 499                 mt->lmargin = term_len(p, INDENT);
 500                 print_bvspace(p, n);
 501                 break;
 502         default:
 503                 p->offset = mt->offset;
 504                 break;
 505         }
 506
 507         return(MAN_HEAD != n->type);
 508 }
 509
 510
 511 /* ARGSUSED */
 512 static int
 513 pre_IP(DECL_ARGS)
 514 {
 515         const struct man_node   *nn;
 516         size_t                   len;
 517         int                      savelit, ival;
 518
 519         switch (n->type) {
 520         case (MAN_BODY):
 521                 p->flags |= TERMP_NOLPAD;
 522                 p->flags |= TERMP_NOSPACE;
 523                 break;
 524         case (MAN_HEAD):
 525                 p->flags |= TERMP_NOBREAK;
 526                 break;
 527         case (MAN_BLOCK):
 528                 print_bvspace(p, n);
 529                 /* FALLTHROUGH */
 530         default:
 531                 return(1);
 532         }
 533
 534         len = mt->lmargin;
 535         ival = -1;
 536
 537         /* Calculate the offset from the optional second argument. */
 538         if (NULL != (nn = n->parent->head->child))
 539                 if (NULL != (nn = nn->next))
 540                         if ((ival = a2width(p, nn->string)) >= 0)
 541                                 len = (size_t)ival;
 542
 543         switch (n->type) {
 544         case (MAN_HEAD):
 545                 /* Handle zero-width lengths. */
 546                 if (0 == len)
 547                         len = term_len(p, 1);
 548
 549                 p->offset = mt->offset;
 550                 p->rmargin = mt->offset + len;
 551                 if (ival < 0)
 552                         break;
 553
 554                 /* Set the saved left-margin. */
 555                 mt->lmargin = (size_t)ival;
 556
 557                 savelit = MANT_LITERAL & mt->fl;
 558                 mt->fl &= ~MANT_LITERAL;
 559
 560                 if (n->child)
 561                         print_man_node(p, mt, n->child, m);
 562
 563                 if (savelit)
 564                         mt->fl |= MANT_LITERAL;
 565
 566                 return(0);
 567         case (MAN_BODY):
 568                 p->offset = mt->offset + len;
 569                 p->rmargin = p->maxrmargin;
 570                 break;
 571         default:
 572                 break;
 573         }
 574
 575         return(1);
 576 }
 577
 578
 579 /* ARGSUSED */
 580 static void
 581 post_IP(DECL_ARGS)
 582 {
 583
 584         switch (n->type) {
 585         case (MAN_HEAD):
 586                 term_flushln(p);
 587                 p->flags &= ~TERMP_NOBREAK;
 588                 p->rmargin = p->maxrmargin;
 589                 break;
 590         case (MAN_BODY):
 591                 term_newln(p);
 592                 p->flags &= ~TERMP_NOLPAD;
 593                 break;
 594         default:
 595                 break;
 596         }
 597 }
 598
 599
 600 /* ARGSUSED */
 601 static int
 602 pre_TP(DECL_ARGS)
 603 {
 604         const struct man_node   *nn;
 605         size_t                   len;
 606         int                      savelit, ival;
 607
 608         switch (n->type) {
 609         case (MAN_HEAD):
 610                 p->flags |= TERMP_NOBREAK;
 611                 break;
 612         case (MAN_BODY):
 613                 p->flags |= TERMP_NOLPAD;
 614                 p->flags |= TERMP_NOSPACE;
 615                 break;
 616         case (MAN_BLOCK):
 617                 print_bvspace(p, n);
 618                 /* FALLTHROUGH */
 619         default:
 620                 return(1);
 621         }
 622
 623         len = (size_t)mt->lmargin;
 624         ival = -1;
 625
 626         /* Calculate offset. */
 627
 628         if (NULL != (nn = n->parent->head->child)) {
 629                 while (nn && MAN_TEXT != nn->type)
 630                         nn = nn->next;
 631                 if (nn && nn->next)
 632                         if ((ival = a2width(p, nn->string)) >= 0)
 633                                 len = (size_t)ival;
 634         }
 635
 636         switch (n->type) {
 637         case (MAN_HEAD):
 638                 /* Handle zero-length properly. */
 639                 if (0 == len)
 640                         len = term_len(p, 1);
 641
 642                 p->offset = mt->offset;
 643                 p->rmargin = mt->offset + len;
 644
 645                 savelit = MANT_LITERAL & mt->fl;
 646                 mt->fl &= ~MANT_LITERAL;
 647
 648                 /* Don't print same-line elements. */
 649                 for (nn = n->child; nn; nn = nn->next)
 650                         if (nn->line > n->line)
 651                                 print_man_node(p, mt, nn, m);
 652
 653                 if (savelit)
 654                         mt->fl |= MANT_LITERAL;
 655
 656                 if (ival >= 0)
 657                         mt->lmargin = (size_t)ival;
 658
 659                 return(0);
 660         case (MAN_BODY):
 661                 p->offset = mt->offset + len;
 662                 p->rmargin = p->maxrmargin;
 663                 break;
 664         default:
 665                 break;
 666         }
 667
 668         return(1);
 669 }
 670
 671
 672 /* ARGSUSED */
 673 static void
 674 post_TP(DECL_ARGS)
 675 {
 676
 677         switch (n->type) {
 678         case (MAN_HEAD):
 679                 term_flushln(p);
 680                 p->flags &= ~TERMP_NOBREAK;
 681                 p->flags &= ~TERMP_TWOSPACE;
 682                 p->rmargin = p->maxrmargin;
 683                 break;
 684         case (MAN_BODY):
 685                 term_newln(p);
 686                 p->flags &= ~TERMP_NOLPAD;
 687                 break;
 688         default:
 689                 break;
 690         }
 691 }
 692
 693
 694 /* ARGSUSED */
 695 static int
 696 pre_SS(DECL_ARGS)
 697 {
 698
 699         switch (n->type) {
 700         case (MAN_BLOCK):
 701                 mt->lmargin = term_len(p, INDENT);
 702                 mt->offset = term_len(p, INDENT);
 703                 /* If following a prior empty `SS', no vspace. */
 704                 if (n->prev && MAN_SS == n->prev->tok)
 705                         if (NULL == n->prev->body->child)
 706                                 break;
 707                 if (NULL == n->prev)
 708                         break;
 709                 term_vspace(p);
 710                 break;
 711         case (MAN_HEAD):
 712                 term_fontrepl(p, TERMFONT_BOLD);
 713                 p->offset = term_len(p, HALFINDENT);
 714                 break;
 715         case (MAN_BODY):
 716                 p->offset = mt->offset;
 717                 break;
 718         default:
 719                 break;
 720         }
 721
 722         return(1);
 723 }
 724
 725
 726 /* ARGSUSED */
 727 static void
 728 post_SS(DECL_ARGS)
 729 {
 730
 731         switch (n->type) {
 732         case (MAN_HEAD):
 733                 term_newln(p);
 734                 break;
 735         case (MAN_BODY):
 736                 term_newln(p);
 737                 break;
 738         default:
 739                 break;
 740         }
 741 }
 742
 743
 744 /* ARGSUSED */
 745 static int
 746 pre_SH(DECL_ARGS)
 747 {
 748
 749         switch (n->type) {
 750         case (MAN_BLOCK):
 751                 mt->lmargin = term_len(p, INDENT);
 752                 mt->offset = term_len(p, INDENT);
 753                 /* If following a prior empty `SH', no vspace. */
 754                 if (n->prev && MAN_SH == n->prev->tok)
 755                         if (NULL == n->prev->body->child)
 756                                 break;
 757                 /* If the first macro, no vspae. */
 758                 if (NULL == n->prev)
 759                         break;
 760                 term_vspace(p);
 761                 break;
 762         case (MAN_HEAD):
 763                 term_fontrepl(p, TERMFONT_BOLD);
 764                 p->offset = 0;
 765                 break;
 766         case (MAN_BODY):
 767                 p->offset = mt->offset;
 768                 break;
 769         default:
 770                 break;
 771         }
 772
 773         return(1);
 774 }
 775
 776
 777 /* ARGSUSED */
 778 static void
 779 post_SH(DECL_ARGS)
 780 {
 781
 782         switch (n->type) {
 783         case (MAN_HEAD):
 784                 term_newln(p);
 785                 break;
 786         case (MAN_BODY):
 787                 term_newln(p);
 788                 break;
 789         default:
 790                 break;
 791         }
 792 }
 793
 794
 795 /* ARGSUSED */
 796 static int
 797 pre_RS(DECL_ARGS)
 798 {
 799         const struct man_node   *nn;
 800         int                      ival;
 801
 802         switch (n->type) {
 803         case (MAN_BLOCK):
 804                 term_newln(p);
 805                 return(1);
 806         case (MAN_HEAD):
 807                 return(0);
 808         default:
 809                 break;
 810         }
 811
 812         if (NULL == (nn = n->parent->head->child)) {
 813                 mt->offset = mt->lmargin + term_len(p, INDENT);
 814                 p->offset = mt->offset;
 815                 return(1);
 816         }
 817
 818         if ((ival = a2width(p, nn->string)) < 0)
 819                 return(1);
 820
 821         mt->offset = term_len(p, INDENT) + (size_t)ival;
 822         p->offset = mt->offset;
 823
 824         return(1);
 825 }
 826
 827
 828 /* ARGSUSED */
 829 static void
 830 post_RS(DECL_ARGS)
 831 {
 832
 833         switch (n->type) {
 834         case (MAN_BLOCK):
 835                 mt->offset = mt->lmargin = term_len(p, INDENT);
 836                 break;
 837         case (MAN_HEAD):
 838                 break;
 839         default:
 840                 term_newln(p);
 841                 p->offset = term_len(p, INDENT);
 842                 break;
 843         }
 844 }
 845
 846
 847 static void
 848 print_man_node(DECL_ARGS)
 849 {
 850         size_t           rm, rmax;
 851         int              c;
 852
 853         c = 1;
 854
 855         switch (n->type) {
 856         case(MAN_TEXT):
 857                 if (0 == *n->string) {
 858                         term_vspace(p);
 859                         break;
 860                 }
 861
 862                 term_word(p, n->string);
 863
 864                 /* FIXME: this means that macro lines are munged!  */
 865
 866                 if (MANT_LITERAL & mt->fl) {
 867                         rm = p->rmargin;
 868                         rmax = p->maxrmargin;
 869                         p->rmargin = p->maxrmargin = TERM_MAXMARGIN;
 870                         p->flags |= TERMP_NOSPACE;
 871                         term_flushln(p);
 872                         p->flags &= ~TERMP_NOLPAD;
 873                         p->rmargin = rm;
 874                         p->maxrmargin = rmax;
 875                 }
 876                 break;
 877         case (MAN_TBL):
 878                 if (TBL_SPAN_FIRST & n->span->flags)
 879                         term_newln(p);
 880                 term_tbl(p, n->span);
 881                 break;
 882         default:
 883                 if ( ! (MAN_NOTEXT & termacts[n->tok].flags))
 884                         term_fontrepl(p, TERMFONT_NONE);
 885                 if (termacts[n->tok].pre)
 886                         c = (*termacts[n->tok].pre)(p, mt, n, m);
 887                 break;
 888         }
 889
 890         if (c && n->child)
 891                 print_man_nodelist(p, mt, n->child, m);
 892
 893         switch (n->type) {
 894         case (MAN_TEXT):
 895                 /* FALLTHROUGH */
 896         case (MAN_TBL):
 897                 break;
 898         default:
 899                 if (termacts[n->tok].post)
 900                         (*termacts[n->tok].post)(p, mt, n, m);
 901                 if ( ! (MAN_NOTEXT & termacts[n->tok].flags))
 902                         term_fontrepl(p, TERMFONT_NONE);
 903                 break;
 904         }
 905
 906         if (MAN_EOS & n->flags)
 907                 p->flags |= TERMP_SENTENCE;
 908 }
 909
 910
 911 static void
 912 print_man_nodelist(DECL_ARGS)
 913 {
 914
 915         print_man_node(p, mt, n, m);
 916         if ( ! n->next)
 917                 return;
 918         print_man_nodelist(p, mt, n->next, m);
 919 }
 920
 921
 922 static void
 923 print_man_foot(struct termp *p, const void *arg)
 924 {
 925         char            buf[DATESIZ];
 926         const struct man_meta *meta;
 927
 928         meta = (const struct man_meta *)arg;
 929
 930         term_fontrepl(p, TERMFONT_NONE);
 931
 932         if (meta->rawdate)
 933                 strlcpy(buf, meta->rawdate, DATESIZ);
 934         else
 935                 time2a(meta->date, buf, DATESIZ);
 936
 937         term_vspace(p);
 938         term_vspace(p);
 939         term_vspace(p);
 940
 941         p->flags |= TERMP_NOSPACE | TERMP_NOBREAK;
 942         p->rmargin = p->maxrmargin - term_strlen(p, buf);
 943         p->offset = 0;
 944
 945         /* term_strlen() can return zero. */
 946         if (p->rmargin == p->maxrmargin)
 947                 p->rmargin--;
 948
 949         if (meta->source)
 950                 term_word(p, meta->source);
 951         if (meta->source)
 952                 term_word(p, "");
 953         term_flushln(p);
 954
 955         p->flags |= TERMP_NOLPAD | TERMP_NOSPACE;
 956         p->offset = p->rmargin;
 957         p->rmargin = p->maxrmargin;
 958         p->flags &= ~TERMP_NOBREAK;
 959
 960         term_word(p, buf);
 961         term_flushln(p);
 962 }
 963
 964
 965 static void
 966 print_man_head(struct termp *p, const void *arg)
 967 {
 968         char            buf[BUFSIZ], title[BUFSIZ];
 969         size_t          buflen, titlen;
 970         const struct man_meta *m;
 971
 972         m = (const struct man_meta *)arg;
 973
 974         /*
 975          * Note that old groff would spit out some spaces before the
 976          * header.  We discontinue this strange behaviour, but at one
 977          * point we did so here.
 978          */
 979
 980         p->rmargin = p->maxrmargin;
 981
 982         p->offset = 0;
 983         buf[0] = title[0] = '\0';
 984
 985         if (m->vol)
 986                 strlcpy(buf, m->vol, BUFSIZ);
 987         buflen = term_strlen(p, buf);
 988
 989         snprintf(title, BUFSIZ, "%s(%s)", m->title, m->msec);
 990         titlen = term_strlen(p, title);
 991
 992         p->offset = 0;
 993         p->rmargin = 2 * (titlen+1) + buflen < p->maxrmargin ?
 994             (p->maxrmargin -
 995              term_strlen(p, buf) + term_len(p, 1)) / 2 :
 996             p->maxrmargin - buflen;
 997         p->flags |= TERMP_NOBREAK | TERMP_NOSPACE;
 998
 999         term_word(p, title);
1000         term_flushln(p);
1001
1002         p->flags |= TERMP_NOLPAD | TERMP_NOSPACE;
1003         p->offset = p->rmargin;
1004         p->rmargin = p->offset + buflen + titlen < p->maxrmargin ?
1005             p->maxrmargin - titlen : p->maxrmargin;
1006
1007         term_word(p, buf);
1008         term_flushln(p);
1009
1010         p->flags &= ~TERMP_NOBREAK;
1011         if (p->rmargin + titlen <= p->maxrmargin) {
1012                 p->flags |= TERMP_NOLPAD | TERMP_NOSPACE;
1013                 p->offset = p->rmargin;
1014                 p->rmargin = p->maxrmargin;
1015                 term_word(p, title);
1016                 term_flushln(p);
1017         }
1018
1019         p->rmargin = p->maxrmargin;
1020         p->offset = 0;
1021         p->flags &= ~TERMP_NOSPACE;
1022
1023         /*
1024          * Groff likes to have some leading spaces before content.  Well
1025          * that's fine by me.
1026          */
1027
1028         term_vspace(p);
1029         term_vspace(p);
1030         term_vspace(p);
1031 }